Grainy footage, captured from an airport security camera, shows the plane was about to touch down on the runway when it violently rears up to avoid contact with another aircraft

Extraordinary new footage captures how an Air Canada jet came to within FIVE FEET of landing on top of another passenger plane at San Francisco International Airport.

Never-seen-before video – captured from an airport security camera – shows Air Canada flight 759 was forced to suddenly abort its landing, seemingly seconds before ploughing into a Philippine Air jet stationery on the runway.

Grainy footage shows the plane was about to touch down on the runway when it violently rears up to avoid contact with another aircraft. US media reported the plane came within five feet of striking the plane under its path.

Experts say the dramatic near-miss on July 7 last year could have led to one of the “greatest aviation disasters” in history, as the plane narrowly missed the crowded runway packed with four passenger jets carrying up to 1,000 passengers and crew.

The Air Canada jet almost hit a plane on the runway at San Francisco airport(Image: National Transportation Saftey Board)

The aircraft reportedly came within five feet of a collision(Image: National Transportation Saftey Board)

US Federal aviation investigators from the National Transportation Safety Board (NTSB) released the footage and hundreds of pages of findings after a major probe was launched.

Its report notes that crew felt fatigued on the passenger flight from Toronto to San Francisco while the first officer was twice rejected in his application to be promoted, US media reports.